1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7722227f87ad47383ed7bf467cd20bf8bd5e7d286afaac1168d328913062810. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebdf9cff-607e-4f6c-bd33-99a2fc6c77f6.json and https://artists.proofprofile.net/proofs/artist/ebdf9cff-607e-4f6c-bd33-99a2fc6c77f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e0137d478dbee9f930a403db45f0f3ba0e65cf8dfc941b03dafd916f347249. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US24A0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1595b72a8f447866de9c1caa1f901d7b00e23ce4629c56b2193fe61e9c2042c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US24A0600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03fd76a167a2805167f1ab9f473ef1e773678a7ac523ba094a6ed28dccf5bb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US24A0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb6360ea2ee7d1f8a95c22e0f746d450c0960d780e91773132a35029400290f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US24A0600012.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8276f03f7c15b758c58a8faed6da40487a063c80371895204739e67a10d3b6c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US24A0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b2c8ed35d3e7c563c6f13b72dcd8447bd39e4e23ea7c17b2ccc284f0e1882f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM80349424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b30cbd139aef123806eacdd858962489d69fce6665a81c7122c71c202f20e4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM80349427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62abb70e5d23be2660ed15a04d1b1b1c51d3928649f4d47eb44bff87c3cf6589. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM80349429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d83c460034ef034145a1b85aa829813e57cef49c132f8671783fe52e88173. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM80349443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5179121652755f0c0f0139d68afdd30361ed0c6ef46a482021c10fa5621fbe21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf92774c7d1b063491713a58feccd27a6e0e6a2a55fc7d864a2dcc26024053e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7924cf902b8e7ef4be324c861544ecd2c8bf52542fdeb9eb77d8b6a9396402c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353c6ca72815bcf36dc7acc5f5dc626d57b383884cd8897d2a93202bad1db11. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1ad9dc4e6324fe7e4911ffc4d9e29bf186f402000037677a0b517dad331e6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819f063ff114d71bc6614992eced7846bd4ac1ea7a651f0c0f57afb37fa9f7e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bcb0de13da1d3ac119cc8ccfc1b098c6eb52018abcf28c227ca33f02ce1799. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a648a21f42aab32b36f499610625640b0b78253e6abb37048b7130f157e5980. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a8e46abf2095169f00581c905909f4cae272251ff99afe0860193c0532269c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fbaf99fac6bea8510c2cfd89f05c65aee9dd83e6ad1a02c1ea0cca98c3b7f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae9ffeec72db022379a2f7fd9d8eee84f17513d1b9850c38f4e233c603592f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc064b77ad80370c84643726c03490fc56db6622e9fb9e4582a8d0a1384595f88. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159b766a8dda6c9fd7d3992629b6c749ec379e156f09ea1220738366bb83961. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b944ac16c160951398bccbd9c0bd602d5c0deafe28e7648ebebab3863b82e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b5bbd1b3bc3a55b232c603d2bc7ecb7d3f05aea5fe63f0b1dcd9a5b0c8524. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:24:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eaf5eb4d879e60ede2c22ba0c4d0b6881ed095e2c6c5a1ea89750f74f6dc57. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:28:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea6a309799258c038f7f2019f2cdcd87a51d27982e244b7e9e1a717cd17726e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAUA9000220.